Designing of poly(vinyl) alcohol and polyaniline conducting polymers doped WS2@rGO@AC hybrid nanocomposite electrode for high performance energy storage devices

Transition metal dichalcogenides (TMDs) are regarded as promising candidates for energy storage applications due to their remarkable electrochemical properties. In this work, tungsten disulfide (WS2) nanosheets are mixed with reduced graphene (rGO) to synthesize an electrode material with enhanced charge flow and active redox sites for efficient energy storage devices. To improve the electrochemical properties, the conducting polymers (PANI and PVA) are incorporated into the WS2@rGO composite. In three electrode system, the WS2@rGO@PVA nanocomposite showed a high value of Qs of 1050C/g, which is much larger then single reference materials. The electrochemical efficiency is improved over individual components due to the extra influence of rGO and PVA, compared to the WS2@rGO@PANI. In hybrid device, a high value of Qs of 175C/g is observed. During the stability measurement, the hybrid electrode exhibited capacity retention of 74.7% after 10000 cycles. The amazing properties of hybrid material make it an appropriate and inspiring candidate for industrial use as a supercapattery electrode material.